If we want to order certain auto-configurations that should not have any direct knowledge of each other, we can also use That annotation has the same semantic as the regular annotation but provides a dedicated order for auto-configuration class RedissonCacheStatisticsProvider redissonCacheStatisticsProvider()")ĥ.7. can use the or annotations if our configuration needs to be applied in a specific order (before of after). We should use when we don’t want to enable the default class Appĥ. The difference between and is that later attempts to configure beans that are found in the classpath during scanning, whereas only runs the configuration classes that we provide in the annotation. import and apply only the specified auto-configuration classes. This can be especially useful for unit or integration tests. It can be used as an alternative to the Spring’s standard annotation so that configuration can be found automatically.Īpplication should only ever include one and most idiomatic Spring Boot applications will inherit it from main difference is both annotations is that allows configuration to be automatically located. indicates that a class provides Spring Boot application configuration. Generally auto-configuration beans are beans (most often using and annotations). They are located using the SpringFactoriesLoader mechanism (keyed against this class). It is also advised to include this annotation only once via classes are regular Spring Configuration beans. annotation enables auto-configuration of the Spring Application Context, attempting to guess and configure beans that we are likely to need based on the presence of predefined classes in classpath.įor example, if we have tomcat-embedded.jar on the classpath, we are likely to want a TomcatServletWebServerFactory.Īs this annotation is already included via so adding it again on main class has no impact. The java class annotated with is the main class of a Spring Boot application and application starts from here. It also involve scanning of annotation and initialize some extra annotation enable all able things in one step. finding all classes in classspath for annotation. This auto-configuration is done by component scanning i.e. Let’s learn about some frequently used spring boot annotations as well as which work behind the scene. The spring boot annotations are mostly placed in and .condition packages.
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